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A three-phase isolated ac-dc converter

A converter and three-phase technology, applied in the direction of converting AC power input to DC power output, irreversible AC power input conversion to DC power output, high-efficiency power electronic conversion, etc., can solve the problem of large DC bus capacitance and the number of switching tubes There are many problems, such as complicated drive circuit design, etc., to achieve the effect of benefiting circuit efficiency, easy high frequency, and large switching loss

Active Publication Date: 2020-07-28
南昌杜迪电子技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this structure requires a large number of switching tubes, the design of the drive circuit is complicated, and the DC bus capacitor is bulky

Method used

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  • A three-phase isolated ac-dc converter
  • A three-phase isolated ac-dc converter
  • A three-phase isolated ac-dc converter

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] As shown in Figure 1(a), a three-phase isolated AC-DC converter according to an embodiment of the present invention includes an A-phase input terminal, a B-phase input terminal, a C-phase input terminal, a three-phase full-bridge structure 100, and a resonant Network 200 and output rectification unit 300.

[0028] The primary side of the three-phase isolated AC-DC converter adopts a three-phase full-bridge structure, and each phase bridge arm adopts a pair of four-quadrant switches. The three-phase full-bridge structure 100 includes an A-phase upper bridge arm switch unit 101, a B-phase upper bridge arm switch unit 102, a C-phase upper bridge arm switch unit 103, an A-phase lower bridge arm switch unit 104, and a B-phase lower arm switch unit 102. The bridge arm switching tube unit 105 and the C-phase lower bridge arm switching tube uni...

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Abstract

The invention discloses a three-phase isolated AC-DC converter, which includes three parts: a primary side, a secondary side and a resonant network. The upper and lower bridge arms of each phase on the primary side adopt a group of common-source anti-series switch tubes with the same structure, the resonant network adopts an LLC series resonant structure, and the rectifier side of the secondary side adopts a rectifier circuit. The power device of the primary circuit of this topology can realize zero-voltage soft turn-on (ZVS), and can realize the function of power factor correction technology (PFC) at the same time. The converter combines power factor correction technology and resonant soft switching technology, so that the input current of the converter follows the input voltage well and realizes the PFC function; the converter realizes stable DC voltage output by controlling the output voltage; at the same time, the The converter has a high-frequency transformer for electrical isolation.

Description

technical field [0001] The invention belongs to the field of power electronics, in particular to an AC-DC converter. Background technique [0002] With the deepening of the global energy crisis and the enhancement of environmental protection awareness in various countries, electric vehicles have been more and more widely used, and electric vehicles in my country have also ushered in explosive growth. scale. As an indispensable energy supply device, the charging system is the key infrastructure for the promotion and application of electric vehicles. But unfortunately, although the number of charging piles continues to double, there are still problems of large size and low efficiency. Therefore, it is of great social and economic significance to study charging systems with high power density and high efficiency. [0003] According to whether the converter contains an isolation transformer, the topology of the charging system can be divided into isolation type and non-isolati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217H02M7/06H02M7/219H02M1/42
CPCH02M1/4233H02M7/06H02M7/217H02M7/219H02M1/0058Y02B70/10
Inventor 刘斌李伦全江良星周涛
Owner 南昌杜迪电子技术有限公司
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